V-type belt



rciccicd Acc. a, i943 iiNi'iizD sfr-Ar V-TYPE BELT 'rhecacre w.fsteinke, Denver, ccic., cssigncr tc Gates Rubber Company, Denver, Colo., a core poration of Colorado sppiiccticn January is, isiafserici Nc. 513,033

-This invention relates to improvements in belts of the side driving V-type.

In the transmission of power by belts, it has 'been found that instead of the usual tension layer of cotton cords, excellent results and longer belt life are obtained whenA stranded metal tension wires are used instead of the ordinary cotton cords. It has been found, however, that if stranded metal tension wires are substituted for the ordinary cotton cords .inifbelts otherwise constructed in the usual manner, the bond between the metal and the rubber composition, comprising or forming parts of the belt body, loosens and when this occurs the belt begins to deteriorate' quite rapidly. v c

It is the object of this invention to produce a beit in which the separation of the tension layer comme. (cru-23s) with which is mixed cotton fibers I3 that extend transversely of the belt. On the outer side of the central body is a body of rubber composition I4 and on the inside of the central body is a body I5 -of rubber composition. The portions on the outside and inside of the central body may be free v from ber or mixedwith fibers or may be made from bias or straight cut rubberized fabric as this invention is independent of the specific nature of those portions of the belt. Enclo'sing the4 gum covering oi.' the tension wires, which has been from the body of the belt will beeither entirely prevented or greatly retarded, thereby prolonging the life of the belt.

The invention, hriciiy described, consists in t coveringl the tension layer with a tacky rubber gum composition having the properties of eil'et ing a good adhesion with the metal surfaces. j

The gum in close contact with the4 wires may either be tree from ilbers or impregnated with vegetable bers such as cotton.

Having thus set out the objects of the invention, and in a general way described the construction, theinvention will now be described in -de-l tail, and for this purpose reference will be had to Y the accompanying drawing in` which the invention has been illustrated, and in which:

Figure 1 is a fragmentary side elevation of a belt with a portion thereof broken away;

designated by reference numeral II, has been omitted .and the laminations I2 mixed with the ilbers I3 is brought into direct contact with the wires I0 of the tension layer. The parts marked Il, I5 and I8 are identical` with those shown and described in connection with Figure 3.

In Figures 4 ,and 5, which are merely enlarged views corresponding to Figures 2 and 3, respectively, the several parts have been designated by the reference numerals given above. x

By means of this expedient, namely, that of embodying the tension layer in gum rubber compounded to remain soft 'and either free from or I2 and body portions I4 and I5 becomeso inti- Figure 5 is a fragmentary section corresponding to the section shown in Figure 3 and to a somewhat larger scale.

In the drawing reference numeral Idesigmate that they do not separate during belt operation.

ybe used, such as nylon, rayon, Celanese, etc.

f The ilbers in the nished belt are preferably arranged parallel and this is effected during the normal operation of calendering with differential rolls.

. Although this ccnstructicn mias its greatest ing to separate the tension elements from the 5 body of the belt are avoided because the soft zum yields quite readily to strains.

Having described the invention what is claimed as new is:

1. A belt of the V-type having two body portions spaced by a. central assembly comprising` a tension layer of stranded metal wires wound in the direction of the length .of the belt; a covering oi' rubber-like material compounded to re-l main softer than the body portions, in direct contact with the wires and enveloping the same, a lamina of rubber composition compounded to ref main softer than the body portions and mixed with textile fibers, positioned on opposite sides ci' the wire covering, the central assembly and the body portions being adhesiveiy bonded to each other to form the completed belt body.

2. A belt as described in claim 1 in which the wire covering is mixed with fibers. l

THEODORE W. STEINKE.

REFERENCES crrnn The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,842,353 Jan. 19, 1932 2,054,819 Freedlander Sept. 15, 1936 l0. 2,211,202 Freediander Aug. 13, 1940 2,257,648 Pierce Sept. 30, 1941 2,326,719 Myers Aug. 10. 1943 2,392,373 Freedlander Jan. 8, 1946 2,411,027 Crosby Nov. 12, 1946 15 2,414,822 'Lindsay et al. Jan, 28, 1947 FOREIGN PATENTS Number Country Date 359,748 Great Britain Oct. 29, 1931 Great Britain Jan. 21, 1932 

